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F. PqMCcoLL AND w. w. wlLLlsoN.

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APPLICATION FILED JULY l, 1918.

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A TTRNEY UNITED STATES PATENT OFFICE.

FRANCIS P. MCCOLL, F RIDG'EWOOD, NEW JERSEY, AND WALTER W. WILLISON, OF NEW YORK, N. Y., ASSIGNORS TO THERMOKEPT PRODUCTS CORPORATION, OF NEW YORK, N. Y., A. CORPORATION 0F MAINE.

GAN.

Original application led September 1, 1917, Serial No. 189,292.

1918. Serial No. 242,931.

To all whom t may concern:

Be it known that we, FRANCIS P. McCoLL, a citizen of Canada, and a resident of Ridgewood, in the county of Bergen and State of New Jersey, and WALTER WILLIAM WIL- LrsoN, a citizen of the United States, and a resident of New York, in the county of New York and State of New- York, have jointly invented a certain new and usefulr present invention also relates to certain details of construction which will be more fully hereinafter described and pointed out in the claims. y

In the accompanying drawing the same reference numerals refer to similar parts in the several figures.

Figure l is a vertical sectional view of the inner container.

Fig. 2 is a perspective view of the cap or cover to be used with the inner container shown in Fig. 1.

Fig. 3 is a sectional view of the metal cap-to be used withthe outer container showing it before it has been dished.

Fig. 4 is a vertical section of the -outer cap similar to Fig. 3, showing the cap detached from the outer container and dished.

Fig. 5 is a vertical section through our complete can showing both inner and outer containers and the openings in the inner container which are sealed by the dishing of the metal cap which also prevents relative l movement between the inner and outer containers.

In canning many articles it is desirable to keep them from coming in contact with the outer container which` is usually va tin can. When the article canned does, in the method of canning now generally in use, come in contact with the tin can it often results in the discoloration of the canned article, and a tinny or metallic taste 'being Specification of Letters Patent.

Patented Apr. 20, 1920.

Divided and this application led July 1,

given to the article which has a tendency to deteriorate due to chemical reaction.

By our method We prevent the article canned from coming into direct contact With the outer tin can. This insures that the canned article will retain its original delicacy of flavor and its own color, and will not be chemically acted upon by the metal of the outer can. y

In carrying our invention into practice we use two containers, an outer metallic container 1, which is an ordinary tin can, and an inner non-metallic container 2 which is usually paper.

The article to be canned is placed in the inner container 2 and the non-metallic cap 3, having very small openings as pin holes 4, 4 is then placed over the inner container 2. The entire inner container 2 is then placed within the outer metallic container 1, Fig. 5.

This outer metallic container or tin can has a metal-cap 5 which has a portion which is normally convex as shown at 6, Fig. 3.

Our invention is particularly applicable to the vacuum canning process in which the air is exhausted from the can before it is Y sealed. The cap 5 is sealed on the tin can (not shown), now well known in the art.

To insure that all the air will be exhausted fromthe interior of the inner container 2, as well as from the metallic container 1, we provide one or more minute apertures or holes 4, 4 usually in the form of pin holes. When the cap 5 is sealed on the can 1 in the vacuum canning machine, that machine will exhaust the air from the outer can 1 and also from the interior of the non-metallic inner container 2, the air passing out through the apertures 4, 4.

Immediately after the sealing of this cap` 5 the vacuum in the canning machine, so far as this can is concerned, is broken. The moment that this occurs, in the passage of the can through the machine, the ordinary atmospheric pressure will dish the cap 5 and make it concave as shown at 7 in Figs. 4 and 5. This willautomatically close the apertures 4, 4 and prevent any of the contents of the inner receptacle 2 working out of the inner container, into the space between the inner and outer containers. At the saine time, it Will exert considerable pressure upon the inner container 2 and prevent any relative movement between the inner container 2 and the outer can l. If desired the cap 5 may be flexed into position by mechanical means to exert pressure upon the inner container 2, to prevent relative movement between the two containers.

It is to be understood that this invention is not to be confined to the use ot' an inner non-metallic container, inasmuch as the novelty of the present invention is equally applicable to metal inner containers as Well.

We have described our invention in connection With an embodiment thereof to which We do not desire to be limited, for what is claimed as new and what is desired to secure by Letters Patent is set forth in the appended claims.

l. An article of manufacture comprising a can having inner and outer containers the inner container having one or more openings, and the outer container having a dished portion sealing said openings.v

2. An article of manufacture comprising a can having an inner non-metallif1 container and an outer metallic container. the inner` non-metallic container having one or more openings, and the outer metallic container having a dished portion sealing said openings in the inner non-metallic container.

FRANCIS P. MoCOLL. WALTER lV.. WILLISON.

Witnesses:

CHRYSTINE GLASER, J AMES F. KELLY. 

